enameled copper wire is particularly important for the selection of copper wire, and a little carelessness may cause a safety accident.

The cause and treatment of yellowing of part of enameled copper wire

The yellowing of enameled copper wire usually has the following reasons:

1. The temperature of the tin furnace is too high and the fluidity is large, which leads to too large pinholes in the coating and rapid copper and tin penetration

2. Tin layer is too thin, copper and tin permeate quickly

3. There are too many halogen residues in the flux and insufficient pickling of the copper surface

4. The packaging time is too fast, the heat cannot be dissipated, and there are too many impurities in the tin furnace

5. The quality of copper is not enough and there are too many impurities

6. Temperature has an effect on the activity of copper atoms. Hot weather turns yellow faster than cold weather.

These problems can be solved in the following ways:

1. Die diameter>Warpage+0.02mm (the purpose is very simple, the coating should not be too thin);

2. After the production is completed, put it for about 2 hours before packaging (purpose: internal heat dissipation);

3. Purchase good flux and match the flux concentration, mainly because the flux affects the quality of tin plating;

4. Choose better oxygen-free copper wire.
Of course, these problems and solutions are also applicable to Round Enameled Copper Wire.